Vibrator



F. G. HOFFINE.

VIBRATOR.

APPLICATION FILED APR. 1o. 1 919.

1,352,894. j Panasept. 14,192

imm

UNITED STATES .PATENT OFFICE.Y

rianne. HorFINE, onKANsAs' CITY, MISSOURI.

vIBItA'roIt,

` Application iled April 10,

T 0 all Iwhom it may Concern Be it known that LFRED G. HOFFINE, a citizen of the United States, residing at Kansas City, inthe countyof-Jackson and State of Missouri, have invented certain new and useful vImprovements in Vibrators and I do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to a vibrator mech-y anism in which a rotary motion is convertedinto a reciprocatory motion oran oscillatory motion and one of the objects thereof is toV provide a simple, durable and eflicient device adapted, through theconversion of' movement, to impart the necessarynumb'erl of beats to an applicator whereby highly beneficial results may be attained.

It is well known that in order to obtain .1 the best results in dissipating congestion in the human body and stimulating circulation, the vibration should be of relatively high frequency and it is not always practicable to attain these results by the mechanism now. in use. I have provided'means, however, whereby motion from a relatively low speed may be converted intorrelatively high frequency vibrations in an eiiieient manner.

In the drawings, Y

Figure 1 isa side elevational view of a vibrator constructed in accordance with my invention.

Fig. 2 is a vertical longitudinal sectional view through the same.-

Fig. 3 is an end view looking from the end of the shaft.

Fig. 4 is a sectional view on the line IV--IV of Fig. 2.

Fi 5 is a sectional view on the line V- of Fig. 2, and

Fig. 6 is a fragmentary perspective view of the reciprocatory shaft and its sleeve, and

Fig. 7 is a modified form of applicator shank. Y

In carrying out my invention provide a shaft-receiving socket 1, which 1s provided with a slotted end 2 communicating with shaft pin receiving seats 3, the edges of the slot being flared to permit the pins 4 of Specincaton of Letters Patent, v Ptnted S6111?. 14, 1920.

1919. seriaiNp. 289,031.

the shaft 5 to be guided into the seats The-shaftand pins4, togetherwith the slot 2 and seats 3 are sol constructed that when the pins arel in thefseatsV 3.*th'e socket 1 and shaft 5 are lclutched*together sothat the socket and theJ operating mechanism willfbe rotatedjinv any' direetionthe'shaft turns.

rKeyed to the socket member 1' by av pin 6 is an eccentric shaft `7 having a cam portion 8 and a cam faced end 9, the cam por-` tionof the member 7` being receivedY within the sleeve 10, which is provided with a longitudinal yslot 11 to receive a'pin 12 on' the housingl, which is provided with an end 14,'one face of which abuts against the shoulder, formed by the eccentric portion -8 of the shaft 7 and the otherv face of which abut's'ag'ainstthesocket member 1, as best seen inFig. 2.

The-sleeve is free from the member 7 vbut is fast to` a re'ciprocatoryshaft or plunger 15 'which is connected thereto by a pin 16, as best-seen in Figsf 2 and 6'. The end of the shaft 15 is provided withcam'fac'es'17 complementaryto thel cam end 9 of the member 7. In Fig. 6l I have shown the end of the shaft 15' as being provided withthree cam projections 17 so that for 'each rotation of the member 7 there will beV three vibrationsofshaft15. 7,34 Bearing against one end of the sleeve 10 is a spring 18 coiled about the shaft v15 and.v having its other end bearing'against aplate 19on.the screw plug 20, which is screwed `into the open end of the housing 18, the

21 slightly greater.; -in vdiameter than the outer diameterofthesocketed end 22'of the shaft 15. The socketed end 22 of the shaft 15 is internally threaded to receive a threaded shank 23 ofthe applicator 24.

When the parts are assembled and a rotary motion is imparted by the shaft 5 Vto the socketed member 1, the cam shaft 7 will be rotated therewith. If the housing 18 is grasped by the operator, the cam shaft v 7 wilI rotate 'independently of the housing and as a result, its cam face 9 will ride over the cam projections 17, imparting a reciprocating motion to the shaft 15 because the eX- pansion spring 18 will always have a tendency to move the projections 17 into contact with the end 9.- The cam portion 8,. at the same time, will impart a wabbly or .pin 12 against rotation, as heretofore eX plained. The multiplicity of cam projections 17 will cause a multiplication of the vibratory movements, `for example, the shaft Y5 is traveling at 600 revolutions, there will be 1800 movements in one direction 1mparted to the applicator 24.

Ifit'is not desired to operate the device in the manner `just described, the operator may let go of the casing 13 and may graspk the sleeved handle 25 of the shaft 5 whereupon the housing will be rotated at the speed of the shaft 5 and consequently, the speed of the applicator 24 will be that of the shaft 5.

From the foregoing, it will be apparent Y that the device is simple of construction,

easily operated, and that it is readily accessible for inspection and repairs, it being only necessary to remove the plug 20 with a Spanner wrench or similar tool, remove the sleeve .'10, and shaft 15 with its spring, the

cam shaft 7 being adapted to be removed by taking out the pin 6 which may be sim* ply put in placeby a drive' fit. It will also be apparent' that the device may be easily assembled, and that the liability of derangement in operation will be reduced .to a minimumif not wholly avoided.

In F ig. 7 I have shown the applicator at right angle to shaft 15 so that a rubbing motion will be imparted tothe applicator; otherwise, the construction is the same`as heretofore described. Y

What I claim and desire to vsecure by Let ters-Patent is: Y y

1. A vibrator comprising avcasing, a cam Y shaft rotatable vin the casing and` having an eccentric portion., a spring-pressed applis cator shaft in line with the eccentric por tion of the cam shaft and rotatable therewith, and means on the applicator shaft cooperating with the camshaft to cause reciprocation of the applicator -shaft inopposition to the spring.

2. A vibrator comprising a casing, a cam shaft rotatable in the casing and having an eccentric portion, a spring-pressed applicator shaft inline with the eccentric portion yof the cam shaft and rotatable therewith,

and movement-multiplying means on the applicator shaft and cooperating with the camshaft to cause reciprocation of the applicator shaft in opposition to the spring.

3.1A vibrator comprising a casing, a cam shaft rotatable in the casing and lhaving an eccentric portion, a spring-pressed vapplicator shaft in line with the cani shaft and rotatable therewith, and a plurality of cam projections on the applicator. shaft and cooperating with the cam shaft to cause reciprocation of the applicator shaft in opposition to the spring.

.4. A vibrator comprising a casing, a cam shaft rotatable in the casing, an applicator tion, ,opposed cams on the respective shafts, a socket on the applicator shaft and sleeved upon the cam shaft, the sleeve being provided with a slot, and a pin inthe casing and projecting' into the slot.

5. A vibrator comprising a Icasing having an inwardly directed projection, an applian inwardly directed projection, an applicator shaft projecting through one end of the shaft,- a cam shaft projectingthrough the other end of the casing and in line with the applicator shaft, a sleeve connecting the two and provided with a slot engaged'by the projection in the casing, and a spring to maintain the Vcam ends of the two shafts in contact.

In testimony whereof I affix my signature.

FRED G. HOFFINE.

` sha-ft longitudinally movable in one direc- 6. A vibrator comprising a casing havingV 

